679491 has 12 divisors (see below), whose sum is σ = 992368. Its totient is φ = 447984.

The previous prime is 679487. The next prime is 679501. The reversal of 679491 is 194976.

679491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 679491 - 2² = 679487 is a prime.

It is a Duffinian number.

679491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (679451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 561 + ... + 1293.

2⁶⁷⁹⁴⁹¹ is an apocalyptic number.

679491 is a deficient number, since it is larger than the sum of its proper divisors (312877).

679491 is a wasteful number, since it uses less digits than its factorization.

679491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842 (or 839 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 679491 is about 824.3124407650. The cubic root of 679491 is about 87.9146469242.

It can be divided in two parts, 6 and 79491, that added together give a palindrome (79497).

The spelling of 679491 in words is "six hundred seventy-nine thousand, four hundred ninety-one".